Mower blade assembly



FIG. 1 is a top, front perspective view of a mower blade assembly showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front side elevational view thereof.

The broken lines depict portions of the mower blade assembly that form no part of the claimed design. 

CLAIM The ornamental design for a mower blade assembly, as shown and described. 